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  • Heart rate variability in healthy subjects: effect of age and derivation of normal ranges for tests of autonomic function.

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Research Article
Heart rate variability in healthy subjects: effect of age and derivation of normal ranges for tests of autonomic function.

https://doi.org/10.1136/hrt.57.1.109-a

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    • Correspondence
      The authors reply
      I A D O'Brien R J M Corrall
      Heart 1987; 57 109-110 Published Online First: 01 Jan 1987. doi: 10.1136/hrt.57.1.109-b